The Xã Đoài orange (Cam xã Đoài, Citrus sinensis 'Xã Đoài') is a cultivar of orange of Spanish origin cultivated in Vietnam at the former Catholic settlement at Xã Đoài, modern Nghi Diên village in Nghi Lộc, Nghệ An. Xã Đoài is the name of the village, and the former Grand Séminaire de Xa-Doai, in the chữ Nôm.[1][2]
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- ^ Alain Forest, Yoshiharu Tsuboï Catholicisme et sociétés asiatiques 1988 -Page 164 "A l'évêché de Xa Doai, son pays natal où il est revenu, il fait réinstaller un village sur des terres plus fertiles et mieux irriguées pour y implanter une variété d'orange espagnole introduite par les missionnaires et devenue célèbre depuis."
- ^ Journal d'agriculture tropicale et de botanique appliquée Muséum national d'histoire naturelle (France) - 1965 - Volume 12 - Page 538 "Aucune variété d'importation n'est supérieure aux variétés vietnamiennes : Xa-Doai, près de Vinh, Cam Dûông, ..."
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction